Questions & Answers about Do apteki jest dalej niż do sklepu.
Because the sentence is talking about distance to a place.
- do apteki = to the pharmacy
- do sklepu = to the shop/store
In Polish, do is the normal preposition when you mean movement or direction toward many enclosed places, buildings, or destinations. Here it does not mean actual movement is happening right now; it just marks the destination in a distance comparison.
They are in the genitive case.
That is because the preposition do requires the genitive:
- apteka → do apteki
- sklep → do sklepu
So a learner should think of do as a preposition that automatically changes the noun into genitive.